Results 141 to 150 of about 28,867 (162)

Debris Avoidance Maneuvers for Spacecraft in a Cluster

Journal of Guidance, Control, and Dynamics, 2017
Spacecraft formation flying and satellite cluster flight have seen growing interest in the last decade.
Elad Denenberg, Pini Gurfil
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Slow Magnetosonic Solitons Detected by the Cluster Spacecraft

Physical Review Letters, 2003
Experimental evidence is provided for the existence of slow-mode magnetosonic solitons in the col-lisionless plasma at the magnetopause boundary layer. The solitons were detected by the fleet of Cluster spacecraft at the dusk flank of the magnetosphere as magnetic field depressions (up to 85%) accom-panied with enhancement of the plasma density and ...
Z. Klos   +6 more
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Basic Study of Spacecraft Plug Cluster Nozzle

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011
We choose a plug cluster nozzle targeting use with geostationary satellites, from the perspective of installation restrictions on rockets and performance improvement. The flow properties were determined via tests and analysis using a feasibility sample scale model plug cluster nozzle, the expansion area ratio e of which was 150.
Kenichi Kajiwara, Ideo Masuda
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Analysis of Cluster spacecraft potential during active control

Advances in Space Research, 2005
Abstract The floating potential of a spacecraft is determined by an equilibrium between photo-electron emission from the sunlit spacecraft surfaces and the plasma electron current, while other currents play a secondary role. On the Cluster spacecraft, the presence of the experiment ASPOC to control the potential by an ion beam with currents up to ...
Torkar, K.   +6 more
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Nodal distance distributions in cluster flight spacecraft network

Mathematical Methods in the Applied Sciences, 2020
The high‐speed flight of cluster flight spacecraft modules increases the uncertainty of network topology. In order to better design the orbital of the cluster flight spacecraft and improve the performance of cluster flight spacecraft network (CFSN), this paper studies the nodal distance distributions (NDDs).
Jinrong Mo   +4 more
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Decentralized autonomous planning of cluster reconfiguration for fractionated spacecraft

Acta Astronautica, 2016
Abstract Autonomous cluster operation such as cluster reconfiguration is one of the enabling technologies for fractionated spacecraft. By virtue of the multi-agent system theory, this paper presents an organizational architecture for fractionated spacecraft, which not only enables autonomous cluster operations but also facilitates its non-traditional
Jing Chu, Jian Guo, Eberhard Gill
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Cluster flight orbit design method for fractionated spacecraft

Aircraft Engineering and Aerospace Technology, 2012
PurposeThe purpose of this paper is to propose an intuitive and effective cluster flight orbit design method for fractionated spacecraft.Design/methodology/approachBased on the concept of fractionated spacecraft, orbit design requirements for cluster flight in the case of fractionated spacecraft are proposed, and categorized into three requirements ...
Jihe Wang, Shinichi Nakasuka
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Feasibility checks and control laws for reconfigurations of spacecraft clusters

2012 American Control Conference (ACC), 2012
A multi-spacecraft system consists of wirelessly-connected spacecraft that share resources in Earth orbit or deep space. One of the enabling technologies of such a fractionated space architecture is cluster flight, which provides the cluster with the capability to perform a cluster scatter and regather maneuvers to rapidly evade debris-like threats or ...
Mehran Mesbahi   +2 more
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Cluster flight control for fractionated spacecraft on an elliptic orbit

Celestial Mechanics and Dynamical Astronomy, 2016
This paper deals with the stabilization of cluster flight on an elliptic reference orbit by the Hamiltonian structure-preserving control using the relative position measurement only. The linearized Melton’s relative equation is utilized to derive the controller and then the full nonlinear relative dynamics are employed to numerically evaluate the ...
Yuying Liang   +3 more
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